1.See corresponding entry in Unabridged plot, formula, system. Plan,project,design,scheme imply a formulated method of doing something. Plan refers to any method of thinking out acts and purposes beforehand:What are your plans for today?A project is a proposed or tentative plan, often elaborate or extensive:an irrigation project.Design suggests art, dexterity, or craft (sometimes evil and selfish) in the elaboration or execution of a plan, and often tends to emphasize the purpose in view:a misunderstanding brought about by design.A scheme is apt to be either a speculative, possibly impracticable, plan, or a selfish or dishonest one:a scheme to swindle someone.